I don't use Poser in great detail, as I export Poser folk to other apps for renders, but, as an Idea...

You can also improve the look after you render, in 2D, ie, paint out problems in Photoshop, or the like? :)

Old tutorial of mine ;)
http://www.silverblades-suitcase.com/artofadreamer/tutorials/htm/sb1.htm

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Tutorials on Poser imports to Vue/Bryce, Postwork, Vue rendering/lighting, etc etc!